gitlab: Sync gitlab-parameters.cfg to upstream

Like for de35c7da.

I've manually reviewed:

    git diff origin/8-8-stable origin/8-9-stable  -- files/gitlab-config-template/gitlab.rb.template \
                                                     files/gitlab-cookbooks/gitlab/attributes/default.rb

on omnibus-gitlab repository.

software/gitlab/gitlab-parameters.cfg

@@ -6,7 +6,7 @@
 #
 # TODO better autogenerate from ^^^ (?)
 #
-# (last updated for omnibus-gitlab 8.8.9+ce.0-g25376053)
+# (last updated for omnibus-gitlab 8-9-stable 5eb2711e)
 
 [gitlab-parameters]
 configuration.external_url              = http://lab.example.com
@@ -70,8 +70,8 @@ configuration.unicorn_worker_processes  = 2
 # unicorn advanced
 configuration.unicorn_backlog_socket    = 1024
 
-configuration.unicorn_worker_memory_limit_min   = 300*(1024**2)
-configuration.unicorn_worker_memory_limit_max   = 350*(1024**2)
+configuration.unicorn_worker_memory_limit_min   = 400*(1024**2)
+configuration.unicorn_worker_memory_limit_max   = 650*(1024**2)
 
 
 # nginx
@@ -85,7 +85,7 @@ configuration.nginx_ssl_protocols           = TLSv1 TLSv1.1 TLSv1.2
 configuration.nginx_ssl_session_cache       = builtin:1000  shared:SSL:10m
 configuration.nginx_ssl_session_timeout     = 5m
 
-configuration.nginx_proxy_read_timeout      = 300
+configuration.nginx_proxy_read_timeout      = 3600
 configuration.nginx_proxy_connect_timeout   = 300
 
 # nginx advanced
@@ -101,6 +101,7 @@ configuration.nginx_gzip_comp_level     = 2
 configuration.nginx_gzip_proxied        = any
 configuration.nginx_gzip_types          = text/plain text/css application/x-javascript text/xml application/xml application/xml+rss text/javascript application/json
 configuration.nginx_keepalive_timeout   = 65
+configuration.server_names_hash_bucket_size = 64
 
 # TODO allow configuring trusted proxies
 # configuration.nginx_real_ip_trusted_addresses

software/gitlab/software.cfg

@@ -303,7 +303,7 @@ md5sum  = eb1230fee50067924ba89f4dc6e82fa9
 
 [gitlab-parameters.cfg]
 <= download-file
-md5sum  = a74670934ec0190cc212d1f3468c11ed
+md5sum  = 30cadd558b3c4d104314b1e40eba0f55
 
 [gitlab-shell-config.yml.in]
 <= download-template